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Posted to issues@hbase.apache.org by "Lars Hofhansl (JIRA)" <ji...@apache.org> on 2012/07/31 06:01:36 UTC
[jira] [Resolved] (HBASE-6427) Pluggable compaction and scan
policies via coprocessors
[ https://issues.apache.org/jira/browse/HBASE-6427?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Lars Hofhansl resolved HBASE-6427.
----------------------------------
Resolution: Fixed
Committed to 0.94 as well.
> Pluggable compaction and scan policies via coprocessors
> -------------------------------------------------------
>
> Key: HBASE-6427
> URL: https://issues.apache.org/jira/browse/HBASE-6427
> Project: HBase
> Issue Type: New Feature
> Reporter: Lars Hofhansl
> Assignee: Lars Hofhansl
> Priority: Minor
> Fix For: 0.96.0, 0.94.2
>
> Attachments: 6427-0.94.txt, 6427-notReady.txt, 6427-v1.txt, 6427-v10.txt, 6427-v2.txt, 6427-v3.txt, 6427-v4.txt, 6427-v5.txt, 6427-v7.txt
>
>
> When implementing higher level stores on top of HBase it is necessary to allow dynamic control over how long KVs must be kept around.
> Semi-static config options for ColumnFamilies (# of version or TTL) is not sufficient.
> This can be done with a few additional coprocessor hooks, or by makeing Store.ScanInfo pluggable.
> Was:
> The simplest way to achieve this is to have a pluggable class to determine the smallestReadpoint for Region. That way outside code can control what KVs to retain.
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